linux-kernel - Re: [PATCH 21/34] usb: cdc-acm: optimize acm

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Date:   Mon, 20 Nov 2023 12:39:29 +0100
From:   Oliver Neukum <oneukum@...e.com>
To:     Yury Norov <yury.norov@...il.com>, linux-kernel@...r.kernel.org,
        Oliver Neukum <oneukum@...e.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org
Cc:     Jan Kara <jack@...e.cz>,
        Mirsad Todorovac <mirsad.todorovac@....unizg.hr>,
        Matthew Wilcox <willy@...radead.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Maxim Kuvyrkov <maxim.kuvyrkov@...aro.org>,
        Alexey Klimov <klimov.linux@...il.com>
Subject: Re: [PATCH 21/34] usb: cdc-acm: optimize acm_softint()



On 18.11.23 16:50, Yury Norov wrote:
> acm_softint(), uses for-loop to traverse urbs_in_error_delay bitmap
> bit by bit to find and clear set bits.
> 
> We can do it better by using for_each_test_and_clear_bit(), because it
> doesn't test already clear bits.
> 
> Signed-off-by: Yury Norov <yury.norov@...il.com>
Acked-by: Oliver Neukum <oneukum@...e.com>